Regulator system



Dec. 27, 1927. 1,654,360

J. H. ASHBAUGH' REGULATOR SYSTEM Filed Oct. 4. 1924 I INVENTOR wnussss;

Jahn H. fish baugb.

. g I 4 i ATTORNEY PatentedDec. 2'7, 1927.

UNITED STATES PATENT orrice.

JOHN H. ASHBAUGH, OF \VILKINSBUBG, PENNSYLVANIA, ASSIGNOR TO WESTING- HOUSE ELECTRIC 82; MANUFAGTURING COMEANY, A CORPORATION OF IENNSYL VANIA.

REGULATOR SYSTEM.

Application filed October 4, 1924. Serial No. 741,643.

My invention relates to regulator systems and more particularly to regulator systems incorporating a short-circuit protective device.

In a regulator system wherein a dynamoelectric machine is used to supply energy to a power circuit, it is customary to maintain a constant machine voltage by varying the energization of the field windings of the dynamo-electric machine. In a regulator system operating to maintain a constant voltage upon the power circuit, should a shortcircuit occur upon the system, the regulator will force the field excitation of the dynamo-electric machine considerably above its normal value in an attempt to maintain normal voltage upon the power circuit. Should the short-circuit be re moved from the line whilethis high field excitation is maintained, the voltage of the machine will rise considerably above its normalvalue before the regulator can operate to decrease the field excitation again to bring the voltage back to its proper value.

One objectofmy invention is to provide a regulator system having a short-circuit protective device operative upon a shortcircuit condition of: the power line to l1m1t the energization of the generator field wind-- ing to a certain percentage of its no-load value. 7

Another object of my invention is to provide a regulator system OftllfitlbOVQ-llldljcated character, having one regulator to govern the energization of the generator field winding in accordance with the generator voltage conditions over a normal range of the generator voltage, and a second regulator operative below a predetermined generator voltagevto maintain a'predetermined energization of the generator field winding. My invention will be better understood by reference to the accompanying drawing, the single figure of which illustrates a system and apparatus embodying my invention.

Referring tothe drawing, a generator 1 provided with an armature 2 and afield winding 3 supplies power to the circu t d-56. The generatorfield wind1ng3 is O supplied with energy from any suitable direct current source, such as the circuit T-8, through motor-operated rheostat 9. The rheostat 9 is operated by a pilot motor 11 that is controlled by the reversing switches 12 and 13, that are actuated by the operation of the regulator ll. The regulator 14 comprises a control electromagnet 15 and an anti-hunting electromagnet 16.

The control electromagnet 15 actuates the movable contact member 17, co-operating with the contact members 18 and 19. The

core member 21 of the control magnet is energized by the winding 22 connected to thevpower circuit supplied by the generator. This core member actuates an armature member 23 carrying the contact member 17 at one end and pivoted at the other end at 24, and opposes the action of a spring member 25. The anti-hunting magnet 16 comprises a core member 26, which is energized by the winding 27 in accordance with the voltage impressed upon the generator field winding 3, and actuates the armature member 28 against theaction of a spring member 31. The armature 28 is pivoted at 29 and carries the contact-inembers 18 and 19.

The reversing switches 12 and 13 are of like construction and comprise an arm member 32 pivoted at '33, carrying a contact member 34 on one arm and a contact member 35 on the other arm. Stationary contact memill) bers36 and 37 are provided which co-operate,

respectively, with the contact members 3 1 and 35. The switches are electrically operated from conductors 3 839 connected to the source of direct'current supply 7-8". Each switch is provided with a pair of electromagnets, the lower one having two differentially related windings 41 and 12. The winding 411 is permanently connected to the circuit 3839 and acts as a holding coil to maintain the switch in the position shown in the drawing. The ditierentiallynvound coil 42 of the lower magnet is connected in circuit with the coil 43 of the upper magnet, and these coils are energized in accordance with the operation of the regulator 14- to operate the switches 12 or- 1.3,separating the the contact members 34 and 36. I

The pilotmotor 11 comprises anal-mature winding 44: and a field winding 15. The field winding'is energized from the directcurrent source 7-8 and the pilot motor armature winding is energized in accordance with the operation of the reversing switches 12, and 13. Asthe regulator 14 operates to make contact between the contact members contact members 35 and 37 and en a ing b C 8v 17 and one of the contact members 18 or 19, switches 12 or 3, thereby operating the one of the reversing switches or 13, will motor 11 to v ry the setting of the rhei stat t), be operated to close contact members 3i and The. control .u'iagi'iet 15 of the regulator 36, energizing the motor 11 to operate in ii is actuated in accordance with the generator forward or in n reverse direction, depending voltage to govern the position of the contact I upon which of the reversing switchcs is miniber l"? and, the iii'iti-iiiu'itiiig nagnet operated. 1t; is ei'iei-gizecl in accoiilanci; "with the vote Upon a. sepzration of the contact member uge impressed upon the ,f f-iifiitltOi' iiielil 17 from its co-opc 'ating contact member, cle winding 3 to m K the positicm or the conener 'izinp' theo eratine' iJUli oi the rei 'cri-iin tact membe to tintl it ti") lone us the 75 P3 .3 c; 2:; switch, the SWitCl'l Wlii then return to its generator vi'iltiigc, or the i ol the dynznnic bra ig position throu ithe open iver circuit, remains Lt pretlcter atlon of the holding coil 41, which is the r the regulator Wlii )vei'n position shown in the thawing. In this position, the in *ature l iof motor is shortcircuiteci through the contact membeie and ,37 ot the rsiug switches, and the nation of the gene to maintain Winger, in ease, however, a short upon the power iine, lorciug 0 or the generator beloix' noi-unil, conductor 39 thus forming a clyneniiebrahi Impressed upon the filti'Ui min; ing circuit to quickly stop the motor. The net to neural be cor espoiniiogly (leer ii,

20 motor 11 op rates an iii-in iil of the rheostut causi the contact uicnilu-sr ii lo engage the 55 9, cutting in or out ot the liehl circuit more contact, member 19, lhereb operating switch or iess ot' the resistor 47. 13 so iii to change the setting of? the rheo- M y invention comprises-s also a s-aecoi'ui rcgs'lz l; b h of thc g'euei'w ulator -18 havin a core inciubel i?) )rovu'leii to lac the 'eneriitor b r e b 2- With a Willtillli" 5i. .ihe core member at) is VOliil i :iQ'uirl to normal. it, however the connected to on armature i2 pivotei'l at o3 generator \Ultztfl'c hil s or; a Pl'ikifittW and operated against the action or a spring llliHWl. illii'llllilliiL. the role 02 will become 51- lo control the position oi the iontactnieintleezmrnzzmi sulucieiiti lo scpuiuite the couber 55. The contact member oo' cooperates tin-i nicnibi s U5 zinc! in, thus r so with contact members 516 and 5?, the former short circuit upon the ol. iiilli ii'il (it which is connected to the contact uieiubcr uniting ills winding "reel in in 1." of the main regulator and the utter ot (I()l' il1l(! with the h" iuiprcsscil upon which is connected to contact 18 of the e *ncrator liQiti w n regnihitor. 'ihe coil Winding 51 is connected ti t imprc.

i t upon 30 through a resistor 58 and coi'icluctoi and t ie generator 1' minding; iiiQOVQ it pro ($1 to the iiehi Wiiu S of the generator. determined vulue will c us I the core Minn-- A reiay ('32, PM it ed. with contact members bet 4-5) to be energised ($3 and (3-1 norma ity short-oi 'cuit-s the Winch come the .inl'hience if ing 51. The contact member i i is actuate-Li n the com u: by the core member 65 which is energized Z 1' ie co,

by the winding (36 that is coi'inec ti to the t 1H: o iti the it, generator terminals or to the 190 \r circuit. ing a decrease in tl The core niei'i'iber i" connei-tcci to an arm tution. In this 'ii'zi the l ture (3T, pivoted at (38, one prtrwitietl with it over the c utroi ol? the motor spring 69 norinaiiy oppos J" the action of t ains :1 prei'lcte on upon Hi) the core'nieinber. the genetor so long; he short circuit The operation ot the system :is toiiows: ems s upon the A to hort Cl?" So long as the generator ."Oiillj is oboie a cuit is removed 1* predetermined value, the core member of voita g e willv incre in the relay {52 wiii be energized to maintain percentage a the contact nien'ibere (53 and 6% closed, thus ing the r ie we generateto a certain Iii l (5&3, ca'usi i cle-energizing the wincin g' 51 of the rennin,- oi" the contact members tor 4-8 ainl. permitting the sprir'r member 54L si'iort-circuitin g the to maintain contact iueinhcr in eugw ing the reguhzl'o: men; with the outiict member 56. In this on will the position of the re if; and the regulator n' hi, as previously 18, the contact member 1? of the i'egz'uiator 1 L modifications in the fil hrii'iltrl unit is connected tl'n'ough the contact 11"lJE15 s;-.s.:ten1 ziu described viii su themselves and, 56 to the SUQPij cmiiuctor E5, and, the o those skiiietl in i no contact menihcrs 18 and it) are connected o1: in 'izi' icrzi'iiou in tl rough the opera coiis ot 1e switches hunted other tl an .12 llilti 1; iinrl the conductor -39 to the supply pended chiiins.

conthictor "2', so 'ent ojl' tl'ie contact member 12" with one of l. e contract menihers 18 or 19 will o ierate one of the inim i 2. In aregulator system, the

field-magnet winding and means for nor mally regulating the energization of said field winding in accordance with the voltage of said dynamo-electric machine, of means rendered operable only below a predetermined machine voltage for maintaining the energization of said field winding substantially constant.

' combiiiation with a dynamo-electric machine having a field-magnet winding and means for normally regulating the energization of said field winding in accordance 'withthe voltage of said dynamo-electric machine, oi? means rendered operable only below a predetermined machine voltage for maintaining a predetermined voltage across said field winding.

3. In a regulator system, the combination with a dynamo-electric machine having a fieldanagnet winding and a regulator for normally controlling the energization of said field winding in accordance with the voltage of said dynamo-electric machine, of a second regulator, operable over a predetermined range of machine voltage, for maintaining a predetermined constant energiaation of said field winding.

4. In a regulator system, the combination with a dynamo electric machine having a field-magnet winding and a regulator for normally controlling the energization of said field winding in accordance with the voltage of said dynamo-electric machine, of a second regulator adapted to maintain a predetermined voltage across said field winding, and means operable over a predetermined range in machine voltage for transferring the control of said field winding from said firstnamed regulator to said second-named regulator,

5. In a regulator system, the combination with a dynamo-electric machine having a field-magnet winding and a regulator for normally controlling the energization of said field winding in accordance with the voltage of said dynamo-electric machine, of a second regulator for controlling the energiza tion of said field winding comprising an electromagnet having a winding connected in parallel circuit relation to said field winding, and means for rendering said second regulator inoperative over a predetermined range in machine voltage.

6. In a regulatorsystem, the combination with a dynamo-electric machine having a field-magnet winding and a regulator for normally controlling the energization of s d field winding inaccordance with the voltage oli said dynamoelectric machine of a secs ond regulator for controlling the energization of said field winding comprising an electroi'nagnet having a winding connected to be energized in accordance with the voltage impressed upon said field Winding, and

a relay for shunting the winding of said electromagnet to render said second regulator inoperative.

7; In a regulator system, the combination with a dynamo-electric machine having a field winding, of a regulator for controlling the energization of said field winding, said regulator comprising a contact men'iberand means for actuating said contact member in accordance with the voltage of said machine, and a pair of co-operating contact members, a second regulator comprising a contact member, means for, actuating said contact member in accordance with the voltage of said field winding, and a pair of co-operating cont-act members, and means for render ing said second-named regulator inoperative over a predetermined voltage range of said machine.

8. In a regulator system, the combination with a dynamo-electric machine having a field winding, of a regulator for controlling the energization of said field windin regulator comprising a contact member actuated in accordance with the voltage of said machine and a pair of contact members co-operating therewith, a second regulator for controlling the energization of said field winding comprising a contact member actuated in accordance with the voltage across said field winding and a pair of co-operating contact members, certain of the contact members of the first-named regulator being connected to contact members or the secondnamed regulator, and means for selecting vone of said regulators to control said field winding over a predetermined voltage range of said dynamo-electric machine.

9. In a regulator system, the combination with a dynamo-electric machine having a field-magnet winding and a regulator for normally regulating the energization of said winding comprising an element actuated in accordance with the voltage of said machine and an element actuated in accordance with the voltage across said winding, a second. regulator connected. to be energized in accordance with the voltage across said fieldmagnet winding and adapted to regulate for a predetermined voltage on said winding, and means energized in accordance with the voltage of said machine for rendering said second regulator inoperative over a predetermined voltage range.

10. In a regulator system, the combination with a dynamo-electric machine having a field-magnet winding and a regulator for normally regulating the energization of said winding to maintain the voltage of said machine substantially constant, a second regulator arranged to supersede theaction of the first-named regulator to limit the excitation of said field winding, said second regulator comprising a winding energized in accordance with the energization of said 0F said field-n1agnet Winding, and means for deenergizing said regulator winding to render.

11. In a regulator system, the coinbinution with a dynamo-electric machinehavng u normally regulating the excitation of said lield-n1ugnet winding to maintain the Volt. age of saidinaclnne substant ally coneta nt a second regulator arranged to supersede V the action ofeaid first-named,regulator to, lnn t the excitation of said field Winding,

and means for initiating the action 61' said second regulutoi and for continuing its action over a predeterm ned range n the voltage of said muchine.

In testimony whereof, I have hereunto subscribed my name this first chiy efw October, 1924:

JOHN nLAs B gU H. 

